Tags: Drug.
Arbaclofen placarbil (ar-BAC-loe-fen pla-KAR-bil also known as XP19986) is a prodrug of R-baclofen. Arbaclofen placarbil possesses more favorable pharmacokinetic profile than baclofen with less fluctuations in plasma drug levels. It was being developed as a potential treatment for patients with GERD and spasticity due to multiple sclerosis; however in May 2013 XenoPort announced the termination of development because of unsuccessful results in phase III clinical trials.